JPH0417021Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a skin thickness adjustment device for a vertical skinning machine that allows the skin thickness to be changed between the ventral side and the dorsal side of a carcass of a pig, etc. .

(Prior Art) Conventionally, vertical skinning machines have been used in disassembly lines for small animals such as pigs, which are capable of skinning pretreated carcasses while suspended from transport rails. This peeling machine is equipped with a skin thickness adjustment device that can adjust the thickness of the peeled skin.

FIG. 9 shows a conventional peeling machine equipped with this skin thickness adjustment device. In this machine, a drive shaft 2 passing through a drum 1 is vertically supported on a frame 3 so as to be rotatable. The clamp 4 is attached to a clamp shaft 43 rotated by a satellite gear 42 meshing with a drive gear 41.
4, a clamp receiver 46 is provided on the inner surface of the edge of the slit-shaped opening 45 of the drum 1, and a guide cover 47 is provided on the right side of the drum 1, and a support cover 48 is provided on the left side of the drum 1.

The support cover 48 is attached to a knife stand 51 having an L-shaped cross section that is rotatably attached to a support bracket 49 protruding from the frame 3 via a support shaft 50. A knife 52 is attached to one edge of the knife stand 51, and one end of a pull bolt 53 is attached to the other edge. An adjusting nut 54 is attached to the other end of the tension bolt 53, and a laminated disc spring 55 is attached between the adjusting nut 54 and the support bracket 49. Furthermore, a push bolt 5 is provided below this pull bolt 53.
6 is screwed onto a protrusion 57 protruding from the support bracket 49. After adjusting the pulling force with the adjustment nut 54, the gap δ between the knife 52 and the drum 1 can be adjusted by appropriately rotating the push bolt 56.

In this skinning machine, the skin end of the carcass S that has been transported along the guide cover 47 is passed through the opening 45 of the drum 1.
When the drive shaft 2 is rotated in the direction of the arrow p, the clamp 44 is rotated in the direction of the arrow q via the drive gear 41 and the satellite gear 42, and the clamp receiver 4 is rotated in the direction of the arrow q.
6 and clamps the skin of the carcass S. As a result,
The drum 1 rotates together with the drive shaft 2 in the direction of arrow r, and as the drum 1 rotates, the carcass S is sent to the support cover 48 on the left side of the drum 1, where it is skinned by a knife 52 while rotating. It's starting to become easier. The thickness of the skin is determined by the gap δ between the knife 52 and the drum 1.

(Problem to be solved by the invention) However, in the conventional skin thickness adjustment device,
The skin thickness can be adjusted by turning the adjusting nut 54 each time for each carcass S of different size, meatiness, etc., but it is not possible to adjust the skin thickness while skinning the same carcass. Can not. For this reason, if a carcass is processed with different skin thicknesses on the ventral and dorsal sides, fat will remain on the ventral skin and the cortex will adhere to the dorsal meat, reducing the quality of the skin and meat. There was a problem.

The present invention was made in view of these problems, and the purpose is to provide a skin thickness adjustment device for a vertical peeling machine that can easily and accurately adjust the skin thickness on the ventral side and the dorsal side. .

(Means for Solving the Problem) In order to achieve the above object, the present invention changes the gap between the drum arranged vertically on the frame and the knife provided on the frame so as to be rotatable and close to the drum. A skin thickness adjustment device for a vertical skinning machine that adjusts the thickness of the skin of a carcass peeled off by a drum includes a knife pushing cylinder that biases the knife in a direction approaching the drum, and a frame. a plurality of wedge sliders interposed between the plurality of fixed members provided on the knife and the movable part of the knife, and first peeling position detection means for detecting the time points before and after the dorsal side peeling starts, respectively;
The present invention includes a second peeling position detecting means, and a slider driving means for driving each of the wedge sliders based on signals from the first and second peeling position detecting means.

(Function) According to the above configuration, the first skinning position detecting means detects this point after the skinning of the ventral side is completed and before moving to the dorsal side, and the slider driving means is activated based on this detection signal. Drive the wedge slider. This results in
The thickness of the wedge slider interposed between the movable part of the knife and the fixed member increases, and the gap between the knife edge and the drum widens, and as a result, the peeled skin becomes thicker.

Further, when the dorsal side is completed, the second peeling position detection means detects this point, and the slider driving means drives the wedge slider based on this detection signal. This narrows the gap between the knife edge and the drum, resulting in a thinner peel.

(Example) Next, an example of the present invention will be described with reference to the drawings.

1 to 3 show a vertical peeling machine equipped with a skin thickness adjusting device according to the present invention. In FIG. 3, the drum 1 is arranged vertically with drive shafts 2 protruding from its upper and lower ends rotatably supported by a frame 3, and has a built-in clamp mechanism (not shown) similar to the conventional one. has been done. A skin thickness adjustment device described below is provided on the left side of the drum 1.

1 and 2, a knife holder 5 is attached to one outer surface of a knife stand 4 having an L-shaped cross section with bolts 6, and a knife 7 is fixed to this knife holder 5 with bolts 8. As shown in FIGS. A support cover 48 is attached to the knife holder 5. Furthermore, brackets 11 are attached to four locations in the longitudinal direction of the other outer surface of the knife stand 4 with bolts 10a, 10b via contact plates 9a, 9b.

The knife stand 4 has contact plates 12 at each of its brackets 11 and at four locations in the vertical direction of the frame 3.
By passing the fulcrum shaft 14 between each support bracket 13 protruding through the
The knife 7 is attached to the drum 1 so as to be rotatable about the fulcrum shaft 14 and to be close to the drum 1. Also, the bracket 1 of the knife stand 4
1, the rod of the knife pushing air cylinder 15 attached to each support bracket 13 is connected to the Y-shaped fitting 1.
6 and are connected by a pin 17.

A fixing wedge 18 is fixed to each of the support brackets 13, and a gauge liner block 19 and a wedge slider are disposed between the fixing wedge 18 and the end surface of each bracket 11 of the knife stand 4, as shown in FIG. A block 20 is interposed.

The gauge liner block 19 has four gauge liners 21 connected via turnbuckles 22, and the uppermost gauge liner 21 connects to a gauge air cylinder 23 attached to the frame 3.
It is suspended from the rod via a link 24.
As shown in FIG. 5, the surface of each gauge liner 21 facing the bracket 11 has a thickness of t ₁ , t ₂ , t ₃ ,
It is formed in a step-like manner so that it changes into four stages of t ₄ ,
Slide grooves 25 are formed on the front and back sides. The gauge air cylinder 23 is provided with a brake operated by a limit switch (not shown), so that the gauge liner 21 can be stopped at each thickness portion during one stroke.

The wedge slider block 20 is made up of four wedge sliders 26 connected via a turnbuckle 27, and the lowest wedge slider 26 is connected to the frame 3.
It is connected via a link 29 to the rod of a slider air cylinder 28 attached to the slider. The surface of each wedge slider 26 facing the fixed wedge 18 is a wedge surface.

In the slider air cylinder 28, air is switched to the rod side based on an on signal from a first limit switch 39a, which will be described later, and air is switched to the head side based on an on signal from a second limit switch 39b. , the wedge slider block 20 is raised and lowered. Air cylinder 2 for this slider
The force by which the wedge slider block 20 is pulled down by the knife pushing air cylinder 15 is greater than or equal to the resultant force of the vertical component on the wedge surface of the wedge slider 26 by the knife pushing air cylinder 15 and the sliding resistance. This prevents the wedge slider 26 from moving upward due to force.

Moreover, between the gauge liner 21 and the wedge slider 26 and between the wedge slider 26 and the fixed wedge 18,
As shown in FIG. 5, rolling elements 30 are interposed to reduce frictional resistance and ensure smooth sliding. Note that, instead of this rolling element 30, a lubricating material such as synthetic resin may be used. The wedge slider 26 has a gauge liner 2 as shown in FIG.
A slide guide 32 having a protrusion 31 that fits into one of the slide grooves 25 is fixed by a bolt 33, and relative movement with the gauge liner 21 in a direction other than the sliding direction is restricted.

Further, as shown in FIG. 1, the gauge liner block 19 and the wedge slider block 20 are fitted into recesses formed by the frame 3 and the support bracket 13, so that their movement in the front-rear direction is restricted. Furthermore, a protrusion 34 (see FIG. 4) protruding from the outer surface of each slide guide 32 is formed by a groove 35 provided on the side of the frame 3 and a regulation plate 36 attached to the support bracket 13. Recess 37
It is designed to be inserted into the frame to restrict movement beyond a certain range in the left and right direction.

On the other hand, as shown in Figures 3, 6, and 7,
A kicker 38 is fixed to the upper end of the drive shaft 2 of the drum 1 so as to be able to come into contact with first and second limit switches 39a and 39b arranged on the upper surface of the frame 3. The first limit switch 39a is turned on before the carcass S is skinned from the ventral side and the back skin is removed for the first time, and the second limit switch 39b is arranged so as to be turned on immediately before the skin on the back side is peeled off. There is.

In the skin thickness adjusting device constructed as described above, during operation, as shown in FIG. The bracket 11 meets the gauge liner 21 and the wedge slider 26 and is pressed against the fixed wedge 18.
As a result, the gap δ between the cutting edge of the knife 7 and the drum 1 is reduced between the bracket 11 of the knife stand 4 and the fixed wedge 1.
The thickness t ₂ of the gauge liner 21 interposed between 8 and
A thickness corresponding to the total thickness T (see FIG. 5) including the thickness t ₀ of the wedge slider 26 is secured.

In this state, the edge of the skin cut into the ventral side of the carcass S that has been transported is fixed with a clamp (not shown) of the drum 1, and then the drum 1 is rotated.
The skin of the carcass S is peeled off at a constant thickness determined by the gap δ between the cutting edge of the knife 7 and the drum 1.
A pressing force is applied by the pulling force of the knife pushing air cylinder 15 against the force received from the skin during peeling, so that peeling is performed smoothly.

As shown in FIG. 6, when the skinning moves from the abdomen to the dorsal side of the carcass S, and the peeler 38 provided on the drive shaft 2 comes into contact with the first limit switch 39a, the air to the slider air cylinder 28 is stopped. As a result of being switched to the side and the rod being pulled in,
Each wedge slider 26 of the wedge slider block 20 slides downward and presses the bracket 11 of the knife base 4 through each gauge liner 21, increasing its thickness t ₀ (see FIG. 5). As a result, the knife stand 4
rotates clockwise in FIG. 1 about the fulcrum shaft 14, and the gap δ between the cutting edge of the knife 7 and the drum 1
becomes larger, and the skin on the back of the carcass S becomes thicker and peeled off, as shown in Figure 6.

When this dorsal skin stripping is completed, the cutter 38 switches the second limit switch 39 as shown in FIG.
When it comes into contact with b, the slider air cylinder 28
The air is switched to the head side and the rod is pushed out, so that the wedge slider 26 slides upward and its thickness t ₀ becomes smaller. As a result, the knife stand 4 rotates counterclockwise in FIG. The skin will be peeled off thinly as shown in Figure 7.

In this way, when processing a single carcass S, the thickness of the skin to be removed from the thicker dorsal side and the thinner ventral side is automatically adjusted, so that excess fat remains on the skin. The quality of the skin improves.

Next, in order to adjust the skin thickness by changing the gap δ between the cutting edge of the knife 7 and the drum 1 for each carcass S with different body size and meat texture, air to the knife pushing air cylinder 15 is supplied to the head. Switch to the side, push out the rod, and attach each bracket 11 of the knife stand 4.
A sufficient gap is provided between the liner and the gauge liner 21 to make the gauge liner 21 free. Then, the gauge liner block 19 is raised and lowered appropriately by the gauge air cylinder 23, and each gauge liner 21
The selected desired thickness portion is stopped at the position of the bracket 11. As a result, the total thickness T of the gauge liner 21 and wedge slider 26 changes, so
Switch the air to the knife pushing air cylinder 15 to the rod side, pull in the rod, and move the bracket 11 to the gauge liner 21 and wedge slider 26.
When the knife 7 is brought into pressure contact with the fixed wedge 18 via the knife 7, the gap δ between the cutting edge of the knife 7 and the drum 1 is changed in accordance with the changed thickness T.

In this way, the skin thickness can be easily adjusted according to the size of the carcass S being transported, so that the quality and yield of meat are improved.

In addition, as shown in FIG. 8, a wedge liner 40 is installed between the frame 3 and the slider air cylinder 28.
The initial value of the total thickness T of the gauge liner 21 and the wedge slider 26 can be adjusted by holding the wedges a and 40b and changing the stop position of the wedge slider 26 to change its thickness t ₀ .

(Effects of the invention) As is clear from the above description, according to the invention, during the skinning process of a carcass, the slider drive means moves the wedge slider to each wedge based on the first and second skinning position detection means. By driving the drum, the gap between the knife edge and the drum is changed, so the thickness of the skin to be peeled off on the ventral and dorsal sides is automatically adjusted. Therefore, the quality of the skin and meat is improved without leaving fat on the skin or not peeling the skin sufficiently.

Further, by driving the wedge slider interposed between the fixed member and the movable part of the knife at the same time, the gap between the blade edge of the knife and the drum is determined, so that the skin thickness can be adjusted accurately.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of the skin thickness adjustment device for a vertical peeling machine according to the present invention, FIG. 2 is a front view of the skin thickness adjustment device with the cover removed, and FIG.
Line sectional view, Figure 4 is a partially enlarged view of Figure 3, Figure 5
The figure is a partially cutaway view of FIG. 4, FIGS. 6 and 7 are plan views showing the peeling process, and FIG. 8 is a front view showing another embodiment of the mounting structure for the air cylinder for the wedge slider. FIG. 9 is a cross-sectional view of a conventional peeling machine, and FIG. 10 is a cross-sectional view taken along the line -- in FIG. DESCRIPTION OF SYMBOLS 1... Drum, 7... Knife, 11... Bracket (movable part), 15... Knife pushing air cylinder, 18... Fixed wedge (fixed member), 26... Wedge slider (gauge member), 28... ... Air cylinder for slider (driving means for slider), 39a,
39b...First and second limit switches (skinning position detection means), S...Carcass, δ...Gap.

Claims (1)

[Claim for Utility Model Registration] By changing the gap between a drum arranged vertically on a frame and a knife rotatably provided on the frame so as to be able to approach the drum, the skin of a carcass is peeled off by the drum. A skin thickness adjustment device for a vertical skin peeler that adjusts the thickness of the skin includes a knife pushing cylinder that urges the knife in a direction approaching the drum, a plurality of fixed members provided on the frame, and a movable part of the knife. a plurality of wedge sliders interposed between the first skinning position detecting means for detecting the time points before and after the skinning of the dorsal side is started;
A vertical peeling machine characterized by comprising a second peeling position detecting means and a slider driving means for driving each of the wedge sliders based on signals from the first and second peeling position detecting means. skin thickness adjustment device.